docs: async def get_joined_rooms(self) -> List[str]:
          """
          Get the list of rooms the user is in. See also: `API reference`_
  
          Returns:
              The list of room IDs the user is in.
  
          .. _API reference:
             https://matrix.org/docs/spec/client_server/r0.3.0.html#get-matrix-client-r0-joined-rooms
          """
          await self.ensure_registered()
          response = await self.client.request("GET", "/joined_rooms")
          return response["joined_rooms"]